Rewire the local sync switches through the pref store.

components/sync/base/sync_prefs.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SYNC_BASE_SYNC_PREFS_H_
 #define COMPONENTS_SYNC_BASE_SYNC_PREFS_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 162 matching lines @@
   void SetPassphraseEncryptionTransitionInProgress(bool value);
   bool GetPassphraseEncryptionTransitionInProgress() const;
 
   // Get/set for saved Nigori specifics that must be passed to backend
   // initialization after transition.
   void SetNigoriSpecificsForPassphraseTransition(
       const sync_pb::NigoriSpecifics& nigori_specifics);
   void GetNigoriSpecificsForPassphraseTransition(
       sync_pb::NigoriSpecifics* nigori_specifics) const;
 
+  // Gets the local sync backend enabled state and its database location.
+  bool IsLocalSyncEnabled() const;
+  base::FilePath GetLocalSyncBackendDir() const;
+
  private:
   void RegisterPrefGroups();
 
   static void RegisterDataTypePreferredPref(
       user_prefs::PrefRegistrySyncable* prefs,
       ModelType type,
       bool is_preferred);
   bool GetDataTypePreferred(ModelType type) const;
   void SetDataTypePreferred(ModelType type, bool is_preferred);
 
@@ skipping 22 matching lines @@
   // etc.
   typedef std::map<ModelType, ModelTypeSet> PrefGroupsMap;
   PrefGroupsMap pref_groups_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncPrefs);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_BASE_SYNC_PREFS_H_